95999 Is "Unlisted neurological or neuromuscular diagnostic procedure" Bill it with notes and it might get paid. Surface EMG is a "fringe" chiropractic procedure that measures surface temperature and prints out a pretty chart that shows where the spine is misaligned. Most insurance companies don't recognize this type of EMG as a valid diagnostic tool. It is NOT the same as an EMG performed by a Neurologist where needles or pads and electricity follow nerve paths to determine if there is damage. If your Chiro is a Neuro/Chiro and is using the same procedure as a Neuro, then notes accompanying the bill should get it paid.
Hope this helps!